Protector for the rollers of dredge-ladders, &amp;c.



'PKT BNTED SEPT. 26, 1905.

R. R. DOUGLAS. PROTECTOR FOR THE ROLLERS 0F DREDGB LADDERS, &0.

APPLICATION TILED JULY 18, 1905.

Imam?" "NITED STATES PATENTOFFIOE.

ROBERT RUTHERFORD DOUGLAS, OF DUNEDIN, NEW ZEALAND.

PROTECTOR FOR THE ROLLERS OF DREDGE-LADDERS, 62.0.

Specification of Letters Patent.

, Patented Sept. 26, 1905.

Application filed July 18,1905. Serial No. 270,233.

To all whom it may concern:

Be it known that 1, ROBERT RUTHERFORD DoUeLAs,engincer, of Dunedin, New Zealand, have invented certain new and useful .Im-

'provements in Protectors for the Rollers of Dredge-Ladders, Elevators, and the Like, of which the followingis a specification.

The object of this invention is to providea protector for the rollers, including the rollerspin'dles, of dredge-ladders, elevators, and the like, by means of which the wear and tear of the rollers and roller-spindles are taken by the protectors, which can be removed when worn,

" thus obviating the necessity of removing the rollers and roller-spindles, and so saving time and expense.

The protectors are simple in their attachment and can be applied readily to both the rollers and roller-spindles,- no machining or shrinking being required. In consequence of the protector fitted to the roller taking all the end view of Fig. 1.

There is a preferably cast-steel liner 1 of suitable diameter and length cast with a taper of, preferably one-half inch in its bore and adapted to .fit on the body of the roller 2, which is also made with a taper equal to that of the liner 1, but running the opposite way. The liners are left in the rough and not machined,.so that in case of any variation in the sizes the taper allows. the linerto. bed or fit itself at some part of the taper of the roller.

The outer end of the liner 1 has a circular flange 3and a rim 10, forming, with the flange, a recess 4 for the purpose of receiving a washer 5, provided with a liner acting as a bush 6 for the end 11 of the'spindle 7. This washer 5 is.

secured to the liner 1 and the roller .2 by two or more bolts 8,which pass through the body of the roller 2, the flange 3, and the washer 5, binding them together on the nuts 9 being tightened up. The bush 6 protects the end 11 of the spindle 7. The washer by reason of its frictional grip of the flange 3, in conjunction with bolts 8, prevents the liner 1 from turning on the roller'and the bush 6 from turning on the spindle. The liners 1 and 6 thus together form a combined protector for the rollers, including the ends of the spindles thereof.

Having now described my invention,whatI claim as new, and desire to secure by Letters Patent, is

1. Protector for'the'rollers of dredge-ladders elevators and the like consisting of the combination with a tapered roller of acorrespondingly-tapered liner provided with a circular fiange at one end and means for securing theflange to the roller substantially as described.

2. Protector for the rollers of dredge-ladders elevators and the like consisting of the combination with a tapered roller of a correspondingly-taperedliner provided with a circular flange and a rim at one end forming a recess, a washer provided with a bush, and means for securing the washer and liner to the roller substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

ROBERT RUTHERFORD DOUGLAS.

Witnesses:

-" A. J. PARK,

AUDREY JAorrsoN.v 

